AU3981800A - Current sensor - Google Patents

Current sensor

Info

Publication number
AU3981800A
AU3981800A AU39818/00A AU3981800A AU3981800A AU 3981800 A AU3981800 A AU 3981800A AU 39818/00 A AU39818/00 A AU 39818/00A AU 3981800 A AU3981800 A AU 3981800A AU 3981800 A AU3981800 A AU 3981800A
Authority
AU
Australia
Prior art keywords
conductor
rings
current
winding
instrument
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU39818/00A
Inventor
Malcolm Stuart Sutton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricardo AEA Ltd
Original Assignee
AEA Technology PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AEA Technology PLC filed Critical AEA Technology PLC
Publication of AU3981800A publication Critical patent/AU3981800A/en
Abandoned legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/18—Railway track circuits
    • B61L1/181—Details
    • B61L1/182—Use of current of indifferent sort or a combination of different current types
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G01R15/185—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core with compensation or feedback windings or interacting coils, e.g. 0-flux sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
    • G01R19/20—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers using transductors, i.e. a magnetic core transducer the saturation of which is cyclically reversed by an AC source on the secondary side

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

An instrument (10) which can sense and measure a DC current in a conductor (12) consists of two adjacent rings (14) of magnetic material arranged to surround the conductor (12). Each ring (14) carries an energising winding connected to an AC source (18) and arranged so the rings (14) are magnetised is opposite directions. A sensing winding (20) is arranged to respond to the sum of the magnetic fluxes in the two rings. Any DC current in the conductor (12) causes a voltage to be induced in the winding (20). This instrument (10) is not affected by the earth's magnetic field, and can measure currents less than 10 mA, so it is suitable for monitoring the current flowing in a track circuit.
AU39818/00A 1999-04-16 2000-04-12 Current sensor Abandoned AU3981800A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9908599.5A GB9908599D0 (en) 1999-04-16 1999-04-16 Current sensor
GB9908599 1999-04-16
PCT/GB2000/001398 WO2000063057A1 (en) 1999-04-16 2000-04-12 Current sensor

Publications (1)

Publication Number Publication Date
AU3981800A true AU3981800A (en) 2000-11-02

Family

ID=10851570

Family Applications (1)

Application Number Title Priority Date Filing Date
AU39818/00A Abandoned AU3981800A (en) 1999-04-16 2000-04-12 Current sensor

Country Status (7)

Country Link
EP (1) EP1171338B1 (en)
AT (1) ATE240230T1 (en)
AU (1) AU3981800A (en)
DE (1) DE60002706T2 (en)
ES (1) ES2199811T3 (en)
GB (1) GB9908599D0 (en)
WO (1) WO2000063057A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102175128A (en) * 2011-01-24 2011-09-07 西安旭彤电子科技有限公司 Differential transformer type line displacement sensor and manufacture and use methods thereof
JP2013217914A (en) * 2012-03-12 2013-10-24 Ferrotec Corp Current sensor, sensor element, and control device
DE102014216404B4 (en) * 2014-08-19 2021-09-09 KATEK Memmingen GmbH Current measuring device and method for detecting a current
JP2017102056A (en) * 2015-12-03 2017-06-08 北川工業株式会社 Current sensor
US9618541B1 (en) * 2016-04-20 2017-04-11 Neilsen-Kuljian, Inc. Apparatus, method and device for sensing DC currents
CN108445282A (en) * 2018-06-14 2018-08-24 东华大学 A kind of implementation method of integrated current detection and inductive function

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1067678A (en) * 1962-11-01 1967-05-03 Univ Southampton Improvements in apparatus for measuring electrical current
US4914381A (en) * 1987-05-28 1990-04-03 Barrigar & Oyen Direct-coupled fluxgate current sensor
DE3940932A1 (en) * 1989-12-12 1991-06-13 Ulrich Doerr Measurement transducer for simultaneous measurement of AC and DC - has two soft magnetic cores, modulation coils and detection coil and uses periodic modulation current
US5501417A (en) * 1994-07-15 1996-03-26 Union Switch & Signal Inc. Noise cancellation in railway cab signal
FR2731974B1 (en) * 1995-03-20 1998-09-11 Robert Jean RAIL TRAFFIC MONITORING DEVICE

Also Published As

Publication number Publication date
ES2199811T3 (en) 2004-03-01
DE60002706T2 (en) 2004-03-25
EP1171338A1 (en) 2002-01-16
DE60002706D1 (en) 2003-06-18
GB9908599D0 (en) 1999-06-09
ATE240230T1 (en) 2003-05-15
EP1171338B1 (en) 2003-05-14
WO2000063057A1 (en) 2000-10-26

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase